Is there a way to flush the disk write cache when O_DIRECT is in use? It seems that direct=1 causes the fsync setting to be ignored. Asias writes: > The O_DIRECT do affect the flush behaviour. e.g > > guest$ fio --fsync=100 --direct=1 > No virtio_blk_handle_flush is observed on host side every 100 IOs > > guest$ fio --fsync=100 --direct=0 > virtio_blk_handle_flush is observed on host side every 100 IOs Am I missing a reason for this behavior? To me it seems weird since you could already use --fsync=0 --direct=1 if you want to guarantee that fsync is not called. I don't see a need to override the fsync setting. Stefan -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
